USAF and RAF ground radars at Lakenheath and Bentwaters tracked 12-15 anomalous objects over East Anglia at speeds exceeding 4,000 mph, executing sharp direction changes and extended hovering. RAF de Havilland Venom interceptors were scrambled; one pilot achieved radar lock before the targeted object rapidly accelerated and maneuvered to a trailing position behind the pursuing aircraft. The case appears in both the Condon Report and Project Blue Book files and is regarded as one of the strongest Cold War radar-visual encounters on record.